Maxi-Therm Indirect Fired Water Heater Installation Manual

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discharge in an area where any remaining hot
water will not cause any damage or injury.
b. Open the drain valve to flush any sediment out of
the bottom to the heater.
c. Shut off the cold water supply. Make sure all hot
water fixtures and circulating pumps are turned
off.
d. Wait for water flow from the hose to stop.
Remove the anode using a socket of the
appropriate size. Do not use an impact wrench.
e. Inspect and replace the anode as required. Use
pipe tape or sealant when reinstalling the anode.
f. Close the drain valve. Open a hot water fixture to
allow air to escape. Open the cold water supply
to the heater and allow the tank to fill.
g. Check your anode and drain valve for leaks.
h. Turn the water heater electricity on for the zone
containing the indirect-fired heater.
4. Sediment (Annual, but harsh water quality may dictate
more frequent service)- Depending on water conditions,
a varying amount of sediment may collect in the tank.
Levels requiring service are indicated by a small
temperature difference in the supply and return lines
(See also “Scale” below). Repeated flushing usually
clears such material. As a preventive measure, water
should be drawn from the tank at the drain valve until it
runs clear.
5. Scale (Annual)- Hard water may cause scale to build-up
on the outside of the heat exchanger coil. A water
softener will prevent this problem (See also “Sediment”
above). Symptoms would be reduced recovery capacity
or reduced temperature differential between boiler
supply and return lines. Repeated flushing should
resolve the problem.